/Engine/Source/Editor/VREditor/Public/UI/VREditorUISystem.h
Function to force an update of the Actor Preview UI based on a change
void UpdateActorPreviewUI ( [TSharedRef](API\Runtime\Core\Templates\TSharedRef)< [SWidget](API\Runtime\SlateCore\Widgets\SWidget) > InWidget, int32 Index, [AActor](API\Runtime\Engine\GameFramework\AActor) * InActor )